44572

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 3/4 of the elements are <= n/2.at n=22A047164
• Number of nonempty subsets of {1,2,...,n} in which exactly 3/4 of the elements are <= (n-1)/2.at n=22A047175
• The Wiener index of the zig-zag polyhex nanotube TUHC_6[2n,2] defined pictorially in Fig. 1 of the Eliasi et al. reference.at n=20A227703